Paper-bag machine



3 Sheets-Sheet 1'.

A.r .-L. STEVENS.

F:(No Model.)

' Patented Aug. 8, 1893.1-

PAPERv BAG MAGHINE.

"LII

(No Model.)

l3 Sheets-Sheet A. L. STEVENS.. PAPER BAG MACHINE. No. 502,784

Patented Aug. s, 1893'.

(No Mam) .aaneen-'sheet s.

.Ag L. STEVENS.

PAPER BAG MAGHINE'.

No.' 502,784. Patented 1Augv.fa, 1893;

y H'I'l TN' ESSE S i 1./VV'ENTOR y/MM l @wg/4M .H tt'orneys. l

UNITED i STATES PATENT OFFICE.

ARTHUR L. STEVENS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THEDIAMOND PAPER BAG'COMPANY, OF WILMINGTON, DELAWARE.

PAPER-BAG -MACHIN E.

SPECIFICATION forming part of Letters Patent No. 502,784, dated August8, 1893. Appnoooioo moa ooooooo 28,1890. sooioi No. 369.636. (No modoi.)

To all whom it may oon/cern,.-

Be it known that I, ARTHUR L. STEVENS, a citizen of the United States,residing in Philadelphia, State of Pennsylvania, have invented certainnew and useful Improvements in Paper-Bag Machines, of which thefollowing is a specification.

My invention relates to paper bag machines' and more especially to thatclass of machines Io in which the paper is formedinto atube from whichthe bag blanks are cut to form the bags, the bottom being tucked orfolded and pasted before the bag blank is severed from the tube', andthis is accomplished while the tube is being formed and passed throughthe machine with a continuous non-varying speed.

My present invention relates more particularly to a machine such as isdescribed and claimed in my Patent No. 415,950, dated Nozo Vember 26,1889, and it consists in certain improvements in the construction,arrangement and mode of operation of the various parts which will bemore particularly set forth hereinafter.

' 2 5 Referring to the accompanying drawings the tube will be accuratelyand evenlypre-v sented to the former however irregular the roll may be.To accomplish this purpose, I support the roll shaft 3, upon arms 2,swinging freely in ahorizontal plane. Thus I mount 4o upon the standards1, the arms 2, having sockets at their free ends for the reception ofthe shaft 3, provided with cones a, and supporting the roll of paper 4.These arms 2, are pivotally mounted in ears 5, 5, secured to thestandards 1, and the rear orinner ends of the arms are connectedtogether by a rod 7, so that while the arms can move slightly on theirpivots to allow the paper roll to vibrate longitudinally, the armswillretain the same re- 5o lation to each other and support the papershaft 3, parallel tothe standards 1, in all positions.

To hold the roll in its proper relation to the pasting devices, I makeuse of a flanged roll B, properly supported to maintain its contact withthe roll of paper whatever its size. Thus the roll B, is supported inswinging arms 9, pivotally attached to the standards 1. The body of theroll bears upon the face of the paper roll while the flanges 12, extenddown 6o the sides thereof to guide the strip laterally 'as it is drawnoff tangentiallyfrom the roll of paper. As'the paper passes from itsroll under the guide roll it'goes over a tension or dandy roll 14,mounted in pivoted arms 15, each provided with a tensin spring 16, andtoe 17, the toes acting as stops to prevent the dandy roll being drawntoo far rearward, but permitting it to yield under the strain upon theweb of paper, so that if the paper strip 7o is slack at either edge, theroll 14, will bear upon it and maintain it taut and properly guide it tothe pasting devices. From the tension or dandy roll, the paper passesover a guide roll 18, where it receives its line of paste on one edgefrom the paste roll 19, rotating in the paste box 20, in the usual way,and from thence the paper passes to the former 21, where it is foldedand formed into a tube in the usual manner.

In the present case l have not illustrated, nor do I deem it necessaryto describe any particular tube-forming devices, as they form `no'partof my present invention, and while any well known devices may be usedfor this purpose, I will assume that the paper fed into the machine inthe manner before described,

is formed into a tube and passes through the feed rolls 22, l22, drivencontinuously at a uniform speed, and is delivered to the bottom 9oforming devices passing over the serrated cutting or tearing edge of theformer 21, and under the fixed serrated tearing blade 23, Where at theproper time the tube is severed by the blade 24, attached to thevibrating slide bar 25, 9 5 which is connected to be operated in amanner set forth in my previous patent or otherwise. As in my priorpatent above referred to, the bottom forming mechanism is mounted upon abase or bed 26, forming part of the main zoo frame, and is adjustablelongitudinally thereon. 'lo effect this a rack bar 27, attached to theframe 28, of the bottom forming mechanism, meshes with the sector 29,which serves as a ready means of moving the frame on the base, the shaftc, of the sector having a handle or square end to receive a handle forturning it. A clamp 30, operated by a hand screw 31, secures the framecarrying the bottoming mechanism to the base in the desired positionafter adjustment, to enable the machine to make bags of the desiredlength.

It may be remarked here that bag tubes of various sizes may be made onthis machine, in a manner well understood and fully set forth in myprior patent and it will be evident that the parts heretofore describedshould be made adjustable or interchangeable for this purpose.

The bottom forming mechanism embraces whatI term a bottoming roll 40, animpression roll 50, and when the bags are to be printed, a fountain rollGO, arranged in juxtaposition and co-operating together with theirdevices hereinafter described to fold one end of each tube to make thebottom, to print the bag, and deliver it from the machine. Thebottomingroll and the impression roll are each provided with blocks 4l,51, respectively, preferably made of hard steel which co-operate to formgripping surfaces that press and hold the folded end of the tube whilethe same is being severed into bag lengths.

Mounted in front of the impression roll is a fixed bar '70, having itsupper face beveled or inclined, and arranged substantially in the line-of the travel of the tube, and a folding blade S0, is supported tovibrate past the bar 70, to fold over the end of the tube against theedge thereof. For instance the folding blade is mounted on curved arms8l, fixed on a shaft S2, which shaft is vibrated by a cam 83, on theshaft 42, of the bottoming roll, and bearin g against the frictionroller S4, the shaft S2, being under tension of a spring 85, whichcauses the folding blade to operate to make the bottom fold by passingbelow the bar '70, in a manner which will be understood. As the foldingmovement is effected by a spring, the blade will yield in a manner toprevent breakage in case the paper should bunch or wad.

Mounted on the frame 28, is the paste box 91, having a blade 00, passingthrough a slot in the lower extremity of the box, and operating in amanner hereinafter set forth to apply paste to the bottom fold. Thispaste box is adjustably mounted on the frame, and I have shown at thesides of the box, knife edged lugs 92, resting on bearing pieces 93,adjustably secured to the frame. The paste boxv is thus pivotallymounted between its ends so that it may be rocked or tilted to morereadily feed the paste to the discharge opening; and in order to adjustthe inclination of the box, as desired I attach to its rear side p alink 95, provided with an adjusting screw 96, adapted to engage theunder side of a cross piece 100. Secured to the forward side of thepaste box is a bracket 97, supporting a guide plate 98 preferablyinclined as shown, and also mounted on the frame 28, upon a standard101, is the guide plate 102, and these plates 9S, and 102, serve todirect the free end of the tube 011 to and over the bottoming roll 40,and insure the proper delivery of the tube end to the rolls and to thebottom forming apparatus. The impression roll 50, is supported on ashaft 52, mounted in boxes 53, which are forced forward by a spring 54,the tension of which is adjustable bya screw 55, passing through thecross piece 100, and in this way a rm contact between the bottoming andimpression rolls is obtained. At the same time the impression roll canyield sufficiently to allow for the varying thicknesses of paperformingthe bag bottom to pass through, and to prevent accident in case thepaper wads.

The bottom forming operations may be briefly described as follows: rlheend of the tube passes beyond the cutting device between the guides 9S,and 102, on the surface of the bottoming roll 40, and its end rides upthe incline of the bar 70, and justat this moment the folding blade 80,is operated to force the tube into 'the bite of the rolls 40, and 50,the bar 70, causing its free end to overlap, and be folded down on tothe body of the bag.

In doing so the end of the tube cornes in contact with the paste blade90, and wipes off 1 sufficient paste to secure the fold in position,

and as soon as this is done the folded end is grasped between thegripping jaws 41, 51, and carried forward, and having receivedthedesired impression it is passed over to the delivery roll 120, andout of the machine. The bag blank is severed just after the bottomingfold is made and seized by the gripping devices, the apparatus being sotimed as to do this. It is desirable that at the moment of severing, thetube should travel at a speed less than its normal so that there shallbe slack paper at the point of severance. Heretofore this slack has beenobtained by varying the speed of rotation of the bottom forming rolls,but as this involves a comparatively complex mechanism and resultsinobjectionable jerks of the paper and the mechanism, I have overcome thisdifficulty by revolving the rolls continuously at a uniform speed, butwith a varying draft on the paper in the following manner: A portion ofthe periphery of the bottoming roll 40, is Hattened or cut away as at44, of a width equal to or greater than the width of the paper tube, andof a sufficient depth to allow the desired amount of slack paper toaccomplish cutting. This cut-away portion commences at a point just tothe rear of the gripping surface or block 41, so `that `after the bottomfold is made and the bag securely gripped, the tube will pass into thislcut-away portion and while the feed of the tube and the speed of therolls are uniform there is allowed a desired amount of slack for IOOsevering the tube as the latter descends into the cut awaypart of theroll. The bottoming rolls as illustrated in the drawings are of agreater diameter than the feeding rolls 22, but the speed of rotation isnot the same for the feed rolls and bottoming rolls, as the time o frotation for the bottoming rolls relative to the feed rolls is dependentupon the size of the bag and is controlled by the size of the changegear, and the bottoming rolls make one revolution for each bag whetherits length is long orshort. The surface velocity of the bottoming rollsis always a little greater than that of the feed rolls, althoughtheamount of this excess of velocity is more or less according to thelength of the bag and the circumference of the bottoming rolls is alittle more than the length of the longest bag made on the machine andof course the circumference of the change gear on the pitch line is theexact length of the bag made. It is unimportant what size the feed rollsare, provided the gear on the feed roll shaft is the same diameter asthe roll. The feed rolls and bottoming rolls have a non-varying speedthat is constant during every revolution, but their relative velocitiesand times of rotation are in practice changed for the various sizes ofbags.

Inasmuch as the contact of the rolls cannot be depended upon to feed thepaper when the retracted face of the roll 40, is opposite to the roll50, I make use of tapes 110, which pass around proper supporting rolls,and which maintain the bag in frictional contact with the roll 50, andcarry it between the latter and the roll 60, during the time that theroll 40, is not in contact with the roll 50.

In order that bags of varying lengths may be formed on the same machine,the bottom forming devices carried by the frame 28, are adjusted to orfrom the cutting and feeding devices, and to properly deliver the bags,andA have the cutting knife operate in time, I provide a changeable gear130, on the shaft' of the bottoming roll, and to properly connect saidgear with the driving shaft 131, and its gear 132, I provide anadjustable gear 140, which is adapted to mesh with and connect the gears130, and 132, under all conditions. In order to do this the gear 140, ismounted upon a stud 141, preferably having a handle 142, and secured andadjusted in a segmental slot 143, by means of a block 144, into whichthe screw threaded end of the stud 141, is screwed, and a washer 145,which bears upon the upper surface of a segment containing the slot, andby this means the stud can be adjusted to any position to enable theteeth of the wheel to properly mesh with the other gears. This segmentalpiece or plate 146, may be attached to the frame or base 26,-in anysuitable manner, and the radius of this segmental piece has for itscenter the axis of the driving gear 132. 'y

As in theprior patent, the impression roll receives motion from thebottoming roll through the medium of the gears 150, 151,

kand the cutting knife which is operated from the disk 152, on the shaft153, is driven by the bevel gears 154, 155, the former of which is adjustably mounted on the shaft 153, so that the beveled gear 155, may bechanged to adjust the cutting blade or striker to act in correct timewith the bottom forming device. In order to operate the paste bladeatthe proper ti me, I mount it in a frame or' on a bar 160, which isarranged to slide between guides 161. Pivoted to the paste box at 162 isa bell-crank lever 163, one end of which engages with the sliding barcarrying the paster 90, and the other end 164, is provided with anelongated slot 165, in which the screw 166, is adj ustably secured andthis screw forms abearingfor the arm 167, mounted on the extension ofthe shaft 52, of the impression roller by an eccentric 168.y

In order to insure the delivery of the bag, I apply a deflector ordoctor in the form of a vertical plate 170, the free end of which takesinto grooves 58, yin the impression cylinder the whole being adjustablysupported by an arm 171, secured to the cross-piece 100.

To properly support the feeding tapes 110 which carry the bag lengthsforward when the depressed or cut-away portion of the gripping roll 40is opposite to the roll 50, said roll 40 is preferably composed of threesections 195, mounted side by side upon the shaft 42,

as shown in Fig. 4, and interposed between y the adjacent ends of thesections on the supporting shaft or on annular collars l 96, formed onsaid ends, are mounted pulleys 197. These pulleys are free to revolveindependently of the gripping roll, and are of such a diameter that whenthey are in proper position the IOO tapes will be guided against lateralmovement on the pulleys by they ends of the roll sections, While theouter carrying surface of the tapes will project slightly above thedeprssed or cut-away portion of the gripping ro It will be evident thatWhile I have described my machine in connection with parts for formingbags from a continuous tube, parts of it maybe employed in the formationof other articles of paper from a continuous strip.

It will be evident that any suitable supportnlay be substituted for thebottoming roll to support the tube normally in an arched position, andfor withdrawing the support when the tube must be slackened during thesevering operation, the feed rolls on each side of the support movinguniformly in all cases.

Without limiting myself to the precise construction and arrangement ofparts shown and described, I claim- 1. The combi-nation ink a machinefor making paper articles from a continuous strip, of feeding rollers,severing device, and gripping rolls moving at a uniform speed, one ofsaid gripping rolls having a flattened or depressed portion,substantially as described to withdraw the support from the strip at thetime it is cut, for the purpose set forth.

2. The combination in a machine for making paper articles from acontinuously moving strip, of feed rolls having uniform speed, asevering device gripping rolls also having a uniform speed but a greatersurface velocity than the feed rolls, one of the gripping rolls beingprovided with a depressed or flattened portion whereby the curvedsupport for the body of the tube is momentarily withdrawn during theaction of the severing device, substantially as described.

3. The combination in a machine for making paper bags from acontinuously moving tube, of feed rolls having a uniform speed, bottomgripping rolls of larger diameter also having a like uniform speed, buta surface velocity greater than that of the feed rolls, the lowergripping roll being provided with a cut-away portion, substantially asdescribed.

4. The combination in a machine for making bags from a continuouslymoving tube, of feed rolls having a uniform` speed, bottom grippingrolls also moving at a uniform speed and provided with gripping blocks,the lower gripping roll being cut-away-or flattened adjacent to itsblock, and a severing device timed to act during the time the tube isabove the flattened part of the roll, substantially as described.

5. The combination in a machine for making paper bags from acontinuously lnoving tube, of feed rolls and bottom gripping rolls allhaving a uniform speed of rotation and one of the gripping rolls havinga cut-away portion, fixed folding bar, vibrating tucking blade, and asevering device timed to act" as the tube passes onto said cut-awayportion of the gripping-roll, substantially as described.

6. The combination in a paper bag machine, of the feeding mechanism,severing device, and gripping rolls, one of said rolls having a cut-awayportion, supporting pulleys adjacent to said cut-away portion of thegripping roll and in the line of the latter, and carrying tapes,substantially as described.

'7. The combination in apaper bag machine, of the feeding and severingmechanism, bottom gripping rolls one of which has a cut-away portion andis composed of three sections, pulleys intermediate of the sections, andcarrying tapes, substantially as described.

S. The combination in a paper bag machine, of feed rolls and bottomgripping rolls having a constant speed of rotation, one of the grippingrolls provided with a cut-away portion, and carrying tapes,substantially as described.

9. The combination in a paper bag machine of feed rolls and bottomgripping rolls having a constant speed of rotation, and one of thegripping rolls provided with a cut-away portion adjacent to the pointwhere it grips the pilot end of the bag, a printing cylinder, andcarrying tapes extending between the gripping rolls and around theprinting cylinder, substantially as described.

10. The combination in a paper bag machine, of feed rolls, bottomgripping rolls the lower one of which has a cut-away portion, printingcylinder, carrying tapes, severing device, xed folding bar, tuckingblade and a pasting device, substantially as described.

11. The combination in a paper `bag machine, of feed rolls having aconstant speed, bottom gripping rolls having a constant speed, the lowergripping roll provided with a cutaway portion, printing cylinder, guideroll, carrying tapes, fixed folding bar, tucking blade, vibratingpaster, and a severing device timed to act as the bag length passes ontosaid cut-away portion of the gripping-roll, substantially as described.

l2. The combination in a paper bag machine, of the bottom grippingrolls, paste receptacle, paster blade, bell-crank lever pivoted to thereceptacle and connected at one end to the blade, an eccentric on theshaft of one of said rolls, and a connection between the oth er end ofsaid lever and said eccentric, substantially as described.

13. The combination in a paper bag machine, ofthe frame, the pastereceptacle, bearings on its sides having sharpened lower ends supportedon the frame, and a link at the rear of the receptacle securing it adjustably to the frame, substantially as described.

14. The combination in a paper bag machine, of the frame, the adjustablebearings thereon, paste receptacle, bearings on its sides havingsharpened ends resting on said adjustable bearings, a link connectingthe rear of the receptacle to the frame, and an adjusting screw,substantially as described.

15. The combination of the frame, the shafts 131 and 42, gear wheelsthereon, a stationary plate 146 having a segmental slot with under cutsides, a bearing piece 14:3 adjustable in said slot, a stud 141supported by the piece 143 and terminating in a handle, and a gear wheelon 'the stud and meshing with the gear wheels on said shafts,substantially as described.

In testimony whereof I havesigned my name to this specification in thelpresence of two subscribing witnesses.

ARTHUR L. STEVENS.

Witnesses:

MINOR HARVEY, FRANK R. STEvENsoN.

IOO

